The backbone is made of many small units of bone or cartilage. what is each unit called? a vertebrate a vertebrae a vertebra a vertebral

0 because theres a difference between pickled peppers and peers.

-hope this : -/

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

your answer would be a, maximum exploitation of resources.